Cargo handling rig



Nov. 22, 1966 J. R. SPERG CARGO HANDLING RIG 5 Sheets-Sheet 1 Filed Nov.6, 1964 i x i INVENTOR.

JOHN R. SPERG BY FIG. I.

ATTORNEYS Nov. 22, 1966 J. R. SPERG CARGO HANDLING RIG Filed Nov. 6,1964 5 Sheets-Sheet 2 I46 28 Q I h 46 l I f I a 1 INVENTOR JOHN R. SPERGF l G. 2.

ATTORNEYS Nov. 22, 1966 J. R. SPERG CARGO HANDLING RIG 3 Sheet -s 5 as/F I s. 3.

FIG. 5, INVENTOR JOHN R. SPERG BY EF 4.441 V W-g{ ATTORNEYS UnitedStates Patent 3,286,851 CARGO HANDLING RIG John R. Sperg, Philadelphia,Pa., assignor to Sun Shipbuilding & Dry Dock Company, Chester, Pa., acorporation of Pennsylvania Filed Nov. 6, 1964, Ser. No. 409,356 3Claims. (Cl. 212-3) This invention relates to a cargo handling rig whichis particularly suitable for shipboard use.

It is frequently desired to employ a single boom which is capable ofworking a hatch forward of the boom and a hatch aft of the boom. This isparticularly the case when it is desired to provide a ship with but asingle heavy lift boom having, for example, a capacity of 80 tons andyet it is desired to have a heavy lift boom available for more than onecargo hold. United States Patents No. 3,107,790, 2,914,193, 3,042,222,and 3,110; 403 are illustrative of the development of cargo handlingrigs to serve two holds. As will be readily apparent, the centralproblem in such rigs is in the structure of the cargo falls to providefor its use both when the boom is working the hold forward of it andwhen the boom is working the hold aft of it. The heretofore known rigsare either expensive and/ or difficult to operate. The rig of thisinvention is at once inexpensive and very simple to operate.

The invention and its objects will be fully clarified on reading thefollowing description in conjunction with the drawings, in which:

FIGURE 1 is a transverse elevation partially broken away of anembodiment of the cargo handling rig in accordance with the inventionwith the boom extending slightly aft;

FIGURE 2 is a longitudinal elevation partially broken away of the cargohandling rig of FIGURE 1;

FIGURE 3 is an enlarged transverse elevation partially broken awayshowing elements of the cargo falls of the rig of FIGURE 1;

FIGURE 4 is a longitudinal elevation partially broken away of the cargofalls elements of FIGURE 3; and

FIGURE 5 is a transverse elevation partially broken away showing thecargo falls blocks of the rig of FIG- URE l with the blocks separated.

A cargo ship main deck 2 has cargo hatches 4 and 6 longitudinallyadjacent to a winch house 8 and a cargo hatch 10 at opposite ends ofwinch house 8. Kingposts 12 and 14 which are on suitable form of mastsare located on the port and starboard side of winch house 8 and havesupported on the top thereof swivel members 16 and 18 which pivot on avertical axis and to which topping lift kingpost blocks 20 and 22 arerespectively pivotally secured for pivoting on a horizontal axis. Uppertopping lift blocks 28 and 30 by means of swivel eyes 28' and 30,respectively, to allow axial rotation are respectively connected topendants 32 and 34 which in turn are pivotally connected to shackles 36and 38 which respectively engage openings 40 and 42 in boom head member44 of boom 46 in which the shackles are free to swing from side to sideas well as up and down.

Boom 46 which may, for example, be a heavy lift boom is mounted at itsheel between kingposts 12 and 14 for universal movement in theconventional manner being mounted for pivotal movement about ahorizontal axis on support 48 which is mounted for free rotation on avertical axis on a boom pedestal 52 mounted on top of winch house 8.

Wire cable 54 is secured to block 28 and reeved through blocks 20 and 28and passes about sheave 56 which is carried by member 57 pivotallysecured on a vertical axis to support member 58 fixedly secured tokingpost 12 and thence downwardly to topping lift winch 3,286,851PatentedNov. 22, 1966 60. Wire cable 64 is secured to block 30 and isreeved through blocks 22 and 30, and passes about sheave 66 secured tosupport member 67 which is pivotally secured in a vertical axis tosupport member 68 which is fixedly secured to kingpost 14. Cable 64passes downwardly from sheave 66 to topping lift winch 70.

The above described structure is essentially conventional for a numberof heretofore known heavy lift cargo rigs which are employed with aforward and an after cargo hold. It is, for example, substantially thesame as described in W. T. Sparrow Patent No. 3,110,403.

The novel cargo falls will now be described. A multiple sheave and amultiple sheave 82 are respectively secured to opposite sides of boom 46and are respectively associated with cargo falls blocks 88 and 90. Asbest seen in FIGURE 3, block 88 has secured thereto a pair of plates 92and 94. A pair of plates 96 and 97 (FIG- URE 4) are welded to plates 92and 94 and are provided with openings (not shown) which are engaged byshackle 100 holding a pendant 102. Similarly, block 90 has securedthereto a pair of plates 104 and 106 which in turn have welded thereto apair of plates 108 and 109 having openings (not shown) for the receptionof a shackle 110 which supports a pendant 112. The lower looped end ofpendants 102 and 112 are shackled together by a shackle 114 which may beemployed to engage a sling, cargo net or the like containing the cargoto be lifted.

A tubular male member 118 having a beveled end 119 is welded to plate106 and is adapted to enter tubular female member 120 which is welded toplate 92. The insertion of member 118 into member 120 maintains the samespread between blocks 88 and 90 as between multiple sheaves 80 and 82 atboom head and prevents unequal loading in the cargo falls.

Referring now to FIGURE 1, a wire cable 126 is wound on Winch 128 andpasses around a sheave 130 and upwardly about sheave 132 which issecured to a support member 133 which in turn is pivotally secured on avertical axis to support member 134- which is fixedly secured tokingpost 14. Cable 126 then passes upwardly through fair lead block 138which is secured to multiple sheave assembly 80 by swivel eye bar 140and pin 142 (FIGURE 3). Cable 126 is then reeved through block 88 andsheave 80. It is led from multiple sheave assembly 80 around horizontalequalizing sheave 144 (FIGURE 4) mounted on the boom head and thence isreeved through multiple sheave assembly 82 and block 90. Cable 126passes from block 90 through fair lead block 146 which is secured tomultiple sheave assembly 82 by swivel eye bar 148 and pin 150 and thenceabout sheave 152 which is secured to support member 153 which ispivotally secured on a vertical axis to support member 156 which isfixedly secured to kingpost 12. Cable 126 then passes over sheave 158and is wound onto winch 160.

In normal operation, blocks 88 and 90 are held together by thehorizontal components of hook load and the spread between blocks ismaintained by members 118 and 120, the boom 46 being topped to thedesired location by the operation of topping lift winches 60 and 70 andthe associated topping lift gear. Thus assuming the boom to be in theposition shown in FIGURES l and 2, if it is desired to work hatch 4,cables 54 and 64 are paid out from winches 60 and 70 until boom 46 is inthe desired position with shackles 114 over, for example, the sling tobe engaged and hoisted. Blocks 88 and 90 and shackle 114 are thenlowered by paying out cable 126 from winches 128 and 160 until shackle114 can be attached to the load. Blocks 88 and 90 are then hoisted bytaking in cable 126 by both winches 128 and 160 to lift the load.Equalizing sheave 144 permits the use of only one winch but the use ofboth winches better equalizes the load in the tackle. After the load ishoisted, winches 60 and 70 are employed in the conventional manner tospot boom 46 so that the load can be lowered over either the. port orstarboard side,

for example, to a dock.

to the positions shown in FIGURE 5. A line 170 is then secured to thelower end of pendant 112 and to a pad eye 172 secured to the oppositeend of the winch house and a line 174 is secured to pendant 102 and to apad eye 176 secured to the opposite end of thewinch.

house. Winches'128 and 160'are now operated to reel in cable 126 whichelevates blocks 88 and 90 and tightens up on lines 170 and 174 spreadingapart blocks 88 and 90 to clear boom 46 and then pulling boom 36 fromthe position slightly aft of the vertical as shown in FIGURE 2 to aposition slightly forward of the vertical as shown in phantom in'FIGURE2. Lines 170 and 174 are then removed and shackle 114 or other suitabletackle is secured to pendants 102 and 112. The boom 46 may then bespottedwhere desired by the operation of topping lift winches 60 and 70.To shift the ,boom from a forward hatch to an after hatch, for example,from hatch 10 to hatch 4, the reverse operation is carried out with theexception that pad eyes 178and 180 which are secured to the other end ofthe winch house are employed.

It will be understood that the foregoing description is by way ofillustration. and not intended to be limiting.

What is claimed is:

1. Cargo handling apparatus comprising a boom having its heel mountedfor universal movement, mast means mounted on either side of said boomheel, boom topping lift means connected to the boom head and said mastmeans for positioning the boom and a pairof cargo fall purchases havingone of the purchases depending from one side of the boomhead and theother of the purchases depending from the other side of the boom head,each purchase comprising a lower block and an upper block which ismounted adjacent the boom head, line means reeved through saidpurchases, winch means operatively connected to said line means, andmeans to connect together the lower purchase blocks comprising aprojecting ber for the reception of the projecting member on the otherlower purchase block.

2. Cargo handling apparatus comprising a boom having its heel mountedfor universal movement, mast means mounted on either side of said boomheel, boom topping lift means connected to the boom head and said mastmeans for positioning the boom over hatches forward and aft of the mastmeans, a pair of cargo fall purchases comprising a pair of sheave meansmounted on opposite sides of the boom head and down the boom from thepoints of connection of the topping lift means to the boom and a pair oflower purchase blocks, means to removably connect together the lowerpurchase blocks, equalizing sheave means at the boom head, a pair oflead blocks mounted on opposite sides of the boom head and down the boomfrom the points of connection of the topping lift means to the. boom, apair of winches, and a line having its free ends respectively wound onthe winches and sequentially extending fromone winch, be-

low one topping lift, and through one lead block, reeved through one ofthe purchases, the equalizing sheave means, and the other purchase, andextending through the other lead block, below the other topping lift andthence to the other winch. 7

3. Cargo handling apparatus in accordance m'th claim 2 in which themeans to connect together the lower purchase blocks comprises aprojecting member on one of the lower purchase blocks and a hollowmember for the reception of the projecting member on the other'of thelower purchase blocks.

References Cited by the Examiner. UNITED STATES PATENTS ANDRES H.NIELSEN, Primary Examiner.

SAMUEL F. COLEMAN, EVON C. BLUNK,

Examiners. A. L. LEVINE, Assistant Examiner.

1. CARGO HANDLING APPARATUS COMPRISING A BOOM HAVING ITS HEEL MOUNTEDFOR UNIVERSAL MOVEMENT, MAST MEANS MOUNTED ON EITHER SIDE OF SAID BOOMHEEL, BOOM TOPPING LIFT MEANS CONNECTED TO THE BOOM HEADS AND SAID MASTMEANS FOR POSITIONING THE BOOM AND A PAIR OF CARGO FALL PURCHASES HAVINGONE OF THE PURCHASES DEPENDING FROM ONE SIDE OF THE BOOM HEAD AND THEOTHER OF THE PURCHASES DEPENDING FROM THE OTHER SIDE OF THE BOOM HEAD,EACH PURCHASE COMPRISING A LOWER BLOCK AND AN UPPER BLOCK WHICH ISMOUNTED ADJACENT THE BOOM HEAD, LINE MEANS REEVED THROUGH SAIDPURCHASES, WINCH MEANS OPERATIVELY CONNECTED TO SAID LINE MEANS, ANDMEANS TO CONNECT TOGETHER THE LOWER PURCHASE BLOCKS COMPRISING APROJECTING